vchoi_fork

[svn-r8176] Purpose:
new feature, bug fix, changed function

Description:
1) implemented the option that says if the dataset is too small , do not compress it
2) bug fix in the SZIP checking . only apply szip to atomic datatypes
3) made the apply_filters function more compact


Solution:

Platforms tested:
linux
AIX
solaris

Misc. update: